Flux Capacitor Charger Wall Mount Adapter

I recently got a ThinkGeek Flux Capacitor USB car charger. Since I already have a USB port in my car, I though it would be more useful to mount in on the wall above my desk instead. I designed this adapter to replace the existing cigarette lighter plug which comes with the charger, allowing you to power the charger off of a 12V DC wall adapter.

FreeCAD source file included, feel free to use and modify it as desired.